From high-end New England running company, Tracksmith - a company Malcolm Gladwell also raves about. Women’s size medium, fits size 4/6, b or c cup. These are my summer wardrobe as they are excellent for muggy weather; perfect for workouts. Sweat dries quickly and they are light and cool. They hold up well to regular wash and dry (thank goodness as I’m rarely careful). This was only worn once as it fit just a little too snuggly for my chest size. Specs: - One internal drop-in pocket built directly in the liner. - Racerback bra that offers both stability and comfort - Offers low- to medium-impact support across bust sizes.